Dakota, The update that I'm talking about is for the 2003 2388 and that would be with the rotor screan on the side not on the back. The part number is 87423308. A sure way to tell if your machine has the up date or not is if the dust chute that comes off the rotor screan is made so the dust falls on the outside of combine side shield. If the dust falls on the inside of the combine side shield it needs to be changed. I had problems with corn husks plugging up that chute and stopping the rotor screen and then plugging everything up. Along with moving the dust chute to the outside of the combine shield the update encludes two seals, several clamps, reroutes some hydraulic lines, and also makes some adjustments on the rotor screen door latch. My door actually came open several times because the latch was never adjusted properly from the factory. It does not take long for things to get dirty in there when that door comes open.